'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'vue Admin Template' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 9528 npm run dev OR npm run dev --port = 9528
const port = process.env.port || process.env.npm_config_port || 9528 // dev port

let externals = {}
let cdn = {
  css: ['https://unpkg.com/element-ui/lib/theme-chalk/index.css' // 提前引入elementUI样式
  ], js: []
}
if (process.env.NODE_ENV === 'production') {
  externals = {
    'vue': 'Vue',
    'echarts': 'echarts',
    'element-ui': 'ELEMENT', // 都是js中全局定义的
    'xlsx': 'XLSX' // 都是js中全局定义的
  }
  cdn = {
    css: [
      'https://unpkg.com/element-ui/lib/theme-chalk/index.css' // 提前引入elementUI样式
    ], // 放置css文件目录
    js: [
      'https://unpkg.com/vue/dist/vue.js', // vuejs
      'https://unpkg.com/element-ui/lib/index.js', // element
      'https://cdn.jsdelivr.net/npm/xlsx@0.16.6/dist/xlsx.full.min.js', // xlsx 相关
      'https://cdn.jsdelivr.net/npm/xlsx@0.16.6/dist/jszip.min.js' // xlsx 相关
    ] // 放置js文件目录
  }
}
// All configuration item explanations can be find in https://cli.vuejs.org/config/
{
  module.exports = {
    /**
     * You will need to set publicPath if you plan to deploy your site under a sub path,
     * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
     * then publicPath should be set to "/bar/".
     * In most cases please use '/' !!!
     * Detail: https://cli.vuejs.org/config/#publicpath
     */
    publicPath: './',
    outputDir: 'dist',
    assetsDir: 'static',
    lintOnSave: process.env.NODE_ENV === 'development',
    productionSourceMap: false,
    devServer: {
      port: port,
      open: true,
      overlay: {
        warnings: false,
        errors: true
      },
      proxy: {
        '/api': {
          // target: 'http://liufusong.top:3000'
          target: 'http://ihrm-java.itheima.net'
        }
      }
      // before: require('./mock/mock-server.js')
    },
    configureWebpack: {
      // provide the app's title in webpack's username field, so that
      // it can be accessed in index.html to inject the correct title.
      name: name,
      resolve: {
        alias: {
          '@': resolve('src')
        }
      },
      externals

    },
    chainWebpack(config) {
      // it can improve the speed of the first screen, it is recommended to turn on preload
      config.plugin('preload').tap(() => [
        {
          rel: 'preload',
          // to ignore runtime.js
          // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
          fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
          include: 'initial'
        }
      ])
      config.plugin('html').tap(args => {
        args[0].cdn = cdn
        return args
      })

      // when there are many pages, it will cause too many meaningless requests
      config.plugins.delete('prefetch')

      // set svg-sprite-loader
      config.module
        .rule('svg')
        .exclude.add(resolve('src/icons'))
        .end()
      config.module
        .rule('icons')
        .test(/\.svg$/)
        .include.add(resolve('src/icons'))
        .end()
        .use('svg-sprite-loader')
        .loader('svg-sprite-loader')
        .options({
          symbolId: 'icon-[name]'
        })
        .end()

      config
        .when(process.env.NODE_ENV !== 'development',
          config => {
            config
              .plugin('ScriptExtHtmlWebpackPlugin')
              .after('html')
              .use('script-ext-html-webpack-plugin', [{
                // `runtime` must same as runtimeChunk username. default is `runtime`
                inline: /runtime\..*\.js$/
              }])
              .end()
            config
              .optimization.splitChunks({
                chunks: 'all',
                cacheGroups: {
                  libs: {
                    name: 'chunk-libs',
                    test: /[\\/]node_modules[\\/]/,
                    priority: 10,
                    chunks: 'initial' // only package third parties that are initially dependent
                  },
                  elementUI: {
                    name: 'chunk-elementUI', // split elementUI into a single package
                    priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                    test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                  },
                  commons: {
                    name: 'chunk-commons',
                    test: resolve('src/components'), // can customize your rules
                    minChunks: 3, //  minimum common number
                    priority: 5,
                    reuseExistingChunk: true
                  }
                }
              })
            // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
            config.optimization.runtimeChunk('single')
          }
        )
    }
  }
}
